POLYMER ELECTROLYTE SECONDARY BATTERY, AND MANUFACTURE THEREOF

摘要

PROBLEM TO BE SOLVED: To provide a polymer electrolyte secondary battery provided with a solid polymer electrolyte layer having high strength and heat resistance and excellent in safety, and to provide manufacture thereof. SOLUTION: A composite type polymer electrolyte membrane having 5×10<-4> S/cm or more of ionic conductivity at 25 deg.C, 300 g or more of piercing strength and 300 deg.C or more of dynamic heat-resisting temperature for the membrane is used for a polymer electrolyte membrane. The composite type polymer electrolyte membrane excellent in safety having high ionic conductivity, high short- circuit preventive strength and high dynamic heat resistance is utilized to provide a polymer electrolyte secondary battery with high safety by an easy manufacturing method.